What RPM does it idle at when warm? Its low idle should be at least 750RPM in gear with the AC on.
Are you running the AC when it dies when you are coming to a stop (on the brakes, engine running low RPM)?
If the low idle is set to low it will stall at low RPM, especially with the AC on.
You can adjust the idle higher if you want it to start a little easier (with no to little pedal) and or live in a cold climate area (easier cold starts and warm-up) .
Auto or manual?
Here is how you adjust the low idle:
http://dodgeram.org/tech/dsl/adjustments/2nd_Gen-Idle.htm